Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si [Function]These keyless drill chucks can easily turn cordless screwdriver into a drill or grinder to achieve fast switching tasks and maintain work ; They are essential electrical tool accessories. [Wide range of applications]These drill chucks have various specifications and can be adapted to drills and cordless screwdriver; They can be applied in car, garages, warehouses, offices, homes, etc. [Easy loading and unloading]This keyless drill chuck converter can go from driving to drilling in seconds, and also gives you the freedom to drill with one hand, great for working in spaces. [Size: (Approx)]0.3 - 3.6 mm, 30g / 0.6-8.0mm, 48g. Colour:black Material:Aluminum alloy + carbon steel Package Contents: 1 set * drill Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.